Flatpak TIOCSTI seccomp Filter Bypass Vulnerability [CVE-2019-10063]
CVE Number – CVE-2019-10063
A vulnerability in Flatpak could allow a local attacker to bypass sandbox protections on a targeted system.The vulnerability exists because the affected software does not use the seccomp filter to prevent sandbox applications from using TIOCSTI IOCTL. An attacker could exploit this vulnerability by submitting a malicious request to the targeted system. A successful exploit could allow the attacker to escape sandbox protections and conduct further attacks.Proof-of-concept (PoC) code that demonstrates an exploit of this vulnerability is publicly available.Flatpak has confirmed the vulnerability and released software updates.
Analysis
- To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement may reduce the likelihood of a successful exploit.
Safeguards
- Administrators are advised to apply the appropriate updates.Administrators are advised to allow only trusted users to access local systems.Administrators are advised to allow only privileged users to access administration or management systems.Administrators are advised to monitor critical systems.
Vendor Announcements
- Flatpak released a bug report at the following link: CVE-2019-10063
Fixed Software
- Flatpak released software updates at the following link: flatpak releases
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.